from williamstown, massachusetts, let's greet... and she teaches at a green school, where the environment is part of the curriculum. from baltimore, maryland, here is... and now here is the host of "jeopardy!" -- alex trebek! thank you, johnny. thank you, ladies and gentlemen, and welcome aboard. in less than half an hour from now, we will know the names of the people who will return to our program next week as semi-finalists to compete for that $100,000 payoff one week from today. e of you coming back to play. good luck. here we go. the jeopardy! round. and here are the categories. oh, boy. alex: you identify the country for us, obviously. cathy, start. same first & last letter for $200, please. timothy. what is a millennium? good. same first & last for $400. cathy. what is cardiac? correct. same first & last letter for $600. [ beep ] and that would be a prenup -- shortened form. cathy.